T491D685K035AT7128

Lifetime @ Temp.:	2000 Hrs @ 125°C
Failure Rate:	--
Features:	General Purpose
Ratings:	--
Manufacturer Size Code:	D
Lead Spacing:	--
Height - Seated (Max):	0.122" (3.10mm)
Size / Dimension:	0.287" L x 0.169" W (7.30mm x 4.30mm)
Package / Case:	2917 (7343 Metric)
Mounting Type:	Surface Mount
Series:	T491
Operating Temperature:	-55°C ~ 125°C
ESR (Equivalent Series Resistance):	1.2 Ohm
Type:	Molded
Voltage - Rated:	35V
Tolerance:	±10%
Capacitance:	6.8µF
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

T491D685K035AT7128 is a tantalum capacitor, which is one of the most popular capacitor technologies currently used in electronics, and it plays a pivotal role in today’s highly sophisticated digital circuits and products. A capacitor is an electronic component which stores and discharges electrical charge. It accumulates electrical energy and then releases it in order to stabilize circuits and to perform many other important functions.

Applications

T491D685K035AT7128 tantalum capacitor is typically employed in order to filter low level signals, to store charge and to provide stable energy in various electronic products. The most common applications of this capacitor include power supply decoupling, noise suppression, storing electrical charge, and filtering HF and RF signals.The capacitor’s high stability and low noise performance makes it extremely suitable for use in consumer electronics products like mobile phones, digital cameras and camcorders, computers and other personal electronic devices. It is also extensively used in professional audio equipment, remote sensing systems, and industrial automation systems.

Structure

T491D685K035AT7128 is a solid tantalum capacitor which is composed of two electrodes and an electrolytic electrolyte. The two electrodes are made from a tantalum pellet as well as an insulated foil, and the electrolyte is a special oxide polymer which is generally dissolved in an organic solvent. This electrolyte is highly conductible and has very good dielectric properties. The pellet electrode is made with a special roll press procedure which allows the tantalum to be accurately formed and compressed to a very consistent size and shape. The two electrodes are connected together via two metal end plates which are adhesively bonded to the sealed outer case. The outer case is typically made from a plastic, such as ABS or PPS, in order to prevent leakage of the electrolyte and to provide insulation between the two electrode plates.

Working Principle

The working principle of a tantalum capacitor is similar to other types of capacitors, in that it accumulates electrical charge and then stores that charge until it is released into the surrounding circuit. When a voltage is applied to the capacitor’s terminals, the electrolyte between the two electrodes will become electrically polarized and create an electric field between the plates. The electric field then stores the charge in the capacitor’s internal components.The capacitor’s ability to accumulate and store electrical charge makes it a key component in the design of many digital circuits and products. It can be used to filter low level signals, to store energy, and to provide protection against power transients.

Conclusion

T491D685K035AT7128 is a tantalum capacitor which is widely used in digital circuits and products due to its low noise performance, high stability, and ability to store electrical charge. Its structure consists of two electrodes and an electrolytic electrolyte, and its working principle is based on the accumulation and storage of electrical charge. Its most common applications include power supply decoupling, noise suppression, storage of electrical charge, and filtering of HF and RF signals.

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